Front strut tower upper bolts size

[15KSChevy]

Anyone know what the bolt size is on the top of the strut tower for the 3 bolts or a gm site that shows? Iv searched the web but can’t find.

[CamGTP]

Something tells me it's like an 18mm or 19mm, I thought it was that on my last truck.

 

I'd know for sure on monday when I remove mine for some stuff I'm doing lol. Just not going out in the dark to check right now.

[Snowcamo]

18mm for sure.

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